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TV RF Power Amplifier 470-860 MHz with BLW32-33 2008-05-26 14:53:19 TV Linear Power Amplifier
for 470-860 MHz taken from Philips Aplication Note (AN_BLW32_33). Please download file in PDF format.The Wide-Band UHF Power Amplifier
for TV Transposer band IV/V designed with transistor BLW32 and BLW33. In this case, my RF Amplifier design replaced them with 2 pieces BLW34 have good result.For combine two BLW34 download file here
UHF TV RF Power Amplifier 100W 2008-05-26 14:47:54 The TV amplifier has been tuned under class-A small-signal conditions and characterised under large signal class-AB conditions from band IV - V in UHF. (All Datasheets)Amplifier
Circuit The total description of the amplifier is given in Figs 6 and 7 and Table 8 (in datasheet). The amplifiers input and output matching networks contain mixed microstrip-lumped elements networks to transform the termi Read more:Power Amplifier
UHF TV Linear Push-Pull Power Amplifier with BLV859 2008-05-26 14:39:49 A broadband linear power amplifier design is presented, suitable for application in TV transposers operating in band IV and V (470 to 860 MHz). The design is based on two BLV859 bipolar transistorscombined with quadrature hybrids. Typical results at the recommended class-A bias point (25.5 V/9.1 A) for the total module include 40 W peak sync output power at -54 dB three tone IMD level (fvision = - Read more:Amplifier
, Linear
Broadband UHF Power Amplifier For TV Transposers 3W 2008-05-26 14:33:46 A broadband RF power amplifier design is presented, suitable for application in TV transposers, operating in UHF band IV and V(470 - 860) MHz, with simple printed circuit board.The Rf power amplifier design is based on a BLW898 bipolar transistor. Typical results at the recommended class-A biaspoint (25 V/1.1 A) for the total module include a 3-tone IMD level of -64 dB (fvision = -8 dB, fsideband Read more:Amplifier
TV RF Power Amplifier 14W #1 2008-05-26 14:24:09 This RF power amplifier works in frequency 470 - 860 MHz UHF Band IV and V with power out 14 Watts with input power 1.5 Watts. The power amplifier is suitable for amplifying rf signal your tv transmitter with 0.5 - 2 watts power output.SchematicRF power amplifier circuit is taken from Philips transistor application note, as you can see below.Part Lists:C1 = C6 = C16 = 4,7 pF (500 V) multilayer c Read more:Amplifier
, Power Amplifier
TV RF Power Amplifier 14W #2 2008-05-26 14:23:42 From #1 TV RF Power Amplifier
14WBIAS CIRCUITBelow is the RF power amplifier's components part list and bias circuit for supply feeding.C1, C2, C4, C5, C6 = 1nF LCC Chip + 10nF LCC ChipC3 = 100µF SpragueC7 = 10µF SpragueD1 = 1N 4001L1, L2 = 5 Turns , Diameter 0.5 mm, W Diameter 3mmP1 = 1k.R1 = 56 ohm/ 1/2WR2 = 5600 ohm, 1/2WR3 = 2.2 ohm, 3WR4, R5 = 56 ohm, 1WR6 = 4,7 ohm, 1/2WT1 : BDX 54 B/BD1 Read more:Power Amplifier
RF Power Amplifer for UHF TV Transmitter #1 2008-05-26 13:58:58 INTRODUCTION The construction taken from the application report NCO8101 two amplifiers for band 4/5 with BLV57 transistors have been described. Reactions on this report proved the necessity to give more information about the construction of these amplifiers. This construction has been based on a heatsink with a printed-circuit board at the upper side and the bias circuits and a forced air-cooling Read more:Transmitter
RF Power Amplifer for UHF TV Transmitter #2 2008-05-26 13:55:18 MECHANICAL MACHINING OF THE HEATSINKThe raised edges at the top side of the heatsink have been removed because the printed circuit board has a width of 113 mm (see Fig.3). To fit the heatsink to the printed-circuit board the following machinings have been carried out:Rectangular holes of 2.8 mm deep have been mould in the heatsink because the transistor leads have to be soldered on the printed-cir Read more:Transmitter
RF Power Amplifier For CATV With BGX881 2008-05-26 12:45:17 This RF power amplifier module is a product of Philips Semiconductor, hybrid amplifier module CATV systems operating over frequency range of 40-860 MHz at a voltage supply of 24V DC with features :· Excellent linearity· Extremely low noise· Silicon nitride passivation· Rugged construction· Gold metallization ensures excellent reliability.This BGX881 CATV Module can also be used to amplify yo Read more:Amplifier
, Power Amplifier
UHF Power Amplifier for 440 MHz 30W 2008-05-26 12:34:48 This RF power amplifier application works on UHF band frequency 440 Mhz and uses as UHF repeater power amplifier. Power amplifier out 30 watts (5 dB gain) use a single transistor 2SD1434.For driving the amplifier use 10-14 watt input with output power range 30-45 watts. Please see datasheet sample design for 470 MHz (SD1434.pdf) and Amplifier
Application produced by Hamtronics.Other use of the pow
300mW FM Transmitter 2SC2538 2008-05-26 12:15:40 The FM transmitter using a varactor diode way radio, plus a Class C amplifier, RF output power of up to 300 mW more open to more than one kilometer distance communications.Select the components of this fm transmitter: Q1 with ≥ 100 mA, Ft ≥ 300 MHz, β ≥ 100 tubes available 3 DG82, 3DG122, 3DG130, 2G711; Q2 with 2SC2538, 2SC1970, etc..It must be noted in the fm transmitter assembly that RF B Read more:Transmitter
Audio Video RF Modulator With MC44BS374 2008-05-26 12:15:31 This Audio
Video RF modulator application working on VHF UHF Band uses a MC44BS374TI from Freescale. MC44BS374 is audio and video modulator for use in Transmit Video and audio and similar device. These IC are the next generation of the MC44BC374TI with the following new features :- TV output level 83dBuV- 5V and 3.3V compatible I2C bus- Logic Output Port pin (pin 3) availableSCHEMATIC DESCRIPTIOND
2.4 GHz Power Amplifier 2008-05-26 12:15:21 The following single-stage transistor linear amplifier posseses a gain of approximately 7 dB and an output power of 1 W in the 13 cm band (approx. 2.4 GHz). It is thus suitable for use, for instance, together with the 13 cm transmit converter. This hybrid power mixer equipped with a varactor diode type BXY. This mean that the described 2.4 GHz power amplifier can provide linear output power in the Read more:Amplifier
MC1374 TV RF Modulator 2008-05-26 12:12:57 The MC1374 includes an FM audio modulator, sound carrier oscillator, RF oscillator, and RF dual input modulator. It is designed to generate a TV signal from audio and video inputs. This TV RF modulator based MC1374 IC from Motorola with wide dynamic range and low distortion audio make it particularly well suited for applications such as video tape recorders, video disc players, TV games and subscr
Audio Video RF Modulator With LM2889 2008-05-26 11:21:10 The LM2889 is designed to interface audio video RF modulator signals to the antenna terminals of a TV receiver. It consists of a sound subcarrier oscillator and FM modulator, video clamp, and RF oscillators and modulators for two low-VHF channels.Audio
Video RF Modulator with LM2889 allows video information from VTRs, video disk systems, games, test equipment, or similar sources to be displayed o
TV RF Modulator With FM-AM Audio Input 2008-05-26 11:20:49 Circuit DescriptionThis TV RF Modulator has option for AM and FM audio input mode, but frequency still controlled by PLL Oscillator.OscillatorThe RF-oscillator is available at pins 3-7. The oscillator operates as a symmetrical Colpitts circuit. The oscillator chip ground, pin 5, should be connected to ground at the resonance circuit shielding point. An external oscillator can be injected inductive Read more:Audio
TV RF Amplifier 5W With BLW98 2008-05-26 11:20:14 This application circuit is a TV RF amplifier for driving small UHF TV transmitters, with gain is 7dB and can amplify a signal between 470-860 MHz. Drive input the circuit with 1 to 1,5 Watts signal. Better use double layer PCB with the second layer connected to earth.Use a stabilized power supply 24 volts and at least 5 Amps. The transistor case is the SOT-122A and be careful because the transis Read more:Amplifier
PIC16F876 RF Power Meter 0-500MHz 2008-05-26 11:19:50 RF Measurement has been an expensive work so far the cost of measuring instruments are concerned. This RF power meter is based on PIC16F876 microcontroller, AD8307 and 2x20 LCD display. Frequency range measurement is 0-500 MHz and Full documentation is included.This rf power meter kit has two push buttons to control the functions. Very cost effective and simple to use. 4 Push buttons used in thi Read more:Meter
FM Transmitter With LCD 2008-05-26 11:19:24 This fm project is fm transmitter using phase locked loop (PLL) method. PLL controlled by PIC16F84A or 16F628A and I2C IC TSA5511 from Philips with LCD display. The fm transmitter is very stable on working frequency 88-108 MHz.Oscillator of the fm transmitter is generated by a FET transistor BF981 and varicap BB809 and buffered by BFR91, BFR96 with final amplifier 2sc1971. Output power final ampli Read more:Transmitter
PLL FM Exciter 500 mW 2008-05-26 11:18:47 Here is a highly stable Direct FM Exciter
with an RF output 500 miliwatts. A phase Locked Loop (PLL) circuit controls the mean freequency of the oscillator. Stability exceeds that of broadcast service standard 0f +2 or -2 KHz for both long and short term drift. Typical drift is less than 200 Hz.A buffer amplifier follows the direct fm oscillator. This provide isolation for the oscillator as well a
Broadcast Audio Compressor Limiter 2008-05-26 11:18:19 This compressor application is a self contained electronic audio device for the compression of the dynamic range of music or voice. A built in compression ratio of 2 to 1 sufficiently boosts modulation level (loudness) but without destroying the dynamic range of the music or voice so that normalness is maintained.A peak limiter is included to keep modulation of a transmitter at or slightly below Read more:Audio
, Broadcast
, Compressor
20 dB VHF RF Amplifier 2008-05-26 11:18:00 This RF amplifier is to strengthen a small signal in the region of VHF or FM, or it is we lead a body, or a receptor. The preamplifier that to you we propose offers 20dB in all the region of VHF and it still can reach also their 500MHZ.The amplifier is a circuit of high frequency RF with distinguishable materials. The amplifier as circuit strengthens the tendency of signal with concrete aid, depen Read more:Amplifier
500mW FM PLL Transmitter 88-108MHz 2008-05-26 11:16:29 FM transmitters have always been fascinating and one can find thousand examples of them on the internet. Sadly most of them are full of error and miss leading information. Most of them also have low stability and frequency drift, many coils and components which are difficult to find. The output power is often set to several watts with just a transistor or two…..can't fool me. So therefore I deci Read more:Transmitter
Stereo Encoder Digital Multiplexing Overview 2008-05-09 11:16:01 The diagram below shows an examples of the theoritical display that one could see on spectrum analyzer connected to output of a stereo encoder. The L+R section is simply the mono signal generated from the stereo input after filtering with a 15 KHz low pass filter. The 19 KHz pilot must be generated by encoder. The L-R (difference) signal must be amplitude modulated onto a suppressed 38 KHz carried Read more:Stereo
, Encoder
, Digital
, Overview
Privacy Policy 2008-04-16 03:34:53 Privacy Policy
for Fmtvguide BlogIf you require any more information or have any questions about our privacy policy, please feel free to contact us by email at fmtvguide@telkom.net.At Fmtvguide Blog, the privacy of our visitors is of extreme importance to us. This privacy policy document outlines the types of personal information is received and collected by Fmtvguide Blog and how it is used.Log F Read more:Privacy
, Privacy Policy
88-108 MHz Ring Circular Polarized Antenna 2008-06-22 23:44:27 This simple antenna called Ring Circular
Polarized Antenna
. You should construct this antenna with .5 inch copper. With a little experiment I did, antenna can be tuned in 88-108 MHz frequency range with only changing the vertical elements. The secret is a ratio of vertical and horizontal dimensions.In fm transmitter you need signal transmitted to any direction so you need antenna type that transmi
Low Power VHF TV Transmitter 2008-06-22 23:21:31 One of the most useful gadgets a video enthusiast can have is a low-power TV Transmitter
. Such a device can transmit a signal from a VCR to any TV in a home or backyard. Imagine the convenience of being able to sit by the pool watching your favorite movie on a portable with a tape or laserdisc playing indoors. You could even retransmit cable TV for your own private viewing. Videotapes can be dubbe
80mW FM Transmitter with Dipole Antenna 2008-06-22 23:10:07 This electronic circuit is a fm transmitter circuit that suitable for beginners for stereo encoder testing. Provided the input stage is designed to accommodate line input levels i.e. approx. 2Vrms into 50kOhm. The transmitter output power is approx. 80mW, which is sufficient to cover an area of about one hundred meters.The RF portion consists of a totally screened oscillator which is operated by a Read more:Antenna
, Transmitter
FM Stereo Encoder for Beginner 2008-06-22 22:59:19 This circuit is a simple fm stereo encoder. A method commonly used in (double side-band suppressed carrier) DSB-SC modulation to provide synchronisation between modulator and demodulator is to transmit a sinusoidal tone (pilot tone) whose frequency and phase are related to the carrier frequency. This tone is positioned at 19 kHz, outside the pass-band of the modulated signal. The carrier frequency Read more:Stereo
, Encoder
, Beginner
5W PLL FM Transmitter from Pira CZ 2008-08-05 21:10:08 Here's a new Phase Locked Loop (PLL) FM Transmitter
from PIRA CZ. This PLL controller is programmed by PIC PIC16F627A with a single I2C TSA5511 (TSA5512/SDA3202). The transmitter includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons. The transmitter can work also without the LCD displa
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